What Mischiefs will insue hereupon every one sees; not only Pains in the Limbs, livid Spots in the Surface of the Body, Ulcers, _&c._ from the Acrimony of the undischarged Moisture; but many besides of those perplexing Symptoms which go by the Name of _Hysterical_ and _Hypochondriacal_, may take their rise from the same Source; for the before cited _Sanctorius_ (189) has remark’d, that the _Flatus or Wind_ so inseparable from those Cases, is no other than _the Fluid of Perspiration rude and unfinished_. If these Inconveniencies are oftentimes not felt, at least not till towards the declining Age, in strong and active Habits of Body; yet I am, from very good Experience, assured, that they deserve Consideration in weaker Constitutions, and a Sedentary Life, especially of the more tender Sex. I have the honour to be nearly related to a worthy Person, who led formerly an afflicted Life from the frequent returns of Violent _Colick Pains_, till she was with happy Success advised by the Noble _Van Helmont_ not to Drink (as she then did) Beer Brewed with _Well-Water_; and her Health is even now so far owing to this Management, that an Error in It is unavoidably follow’d with the wonted Complaints. For these Reasons _Pliny_ (190) tells Us, that _Those Waters are Condemn’d in the first Place, which when Boiled do incrustate the sides of the Vessels_; And that our _Well-Waters_ do this, no Body who looks into the _Tea-Kettles_ of our Gentlewomen can be Ignorant. And indeed in Ancient Times, when Physick was more a Science, which is now more a Trade, as that Part of It, which relates to _Diet_ was more carefully studied, than it is Now-a-days; so this Point particularly of which we are Treating was of so great Moment, that _Hippocrates_, who wrote the best Book (191) on the Subject that ever was Publish’d, has in a great Measure accounted not only for the Diseases, but even for the Temper and Disposition of the People of several Countries, from the Difference of the _Waters_ with which Nature has supplied Them. FOOTNOTES to ESSAY V. (152) _Virgil_ Æn. 7. v. 8. ―― _Sævamq; exhalat. opaca Mephitim._ _Vid. Servium, ibid._ (153) _Scaliger. Conject. in Varron._ (154) Lib. 13. (155) _De Situ Orb._ l. 1. c. 13. (156) Ἐιν Ἀρίμοις ὅθι φασὶ Τυφώεος ἔμμθυαι ἐυνάς. Il. Β. v. 783. (157) _Nat. Quæst._ l. 6. c. 28. (158) Nat. Hist. l. 2. c. 93. (159) _L. di Capoa delle Mofet._ pag. 37. (160) Vid. _Malpigh. de Pulmon._ (161) _Vid. L. di Capoa Mofet._ pag. 40. (162) Pag. 128. (163) _Epidem._ l. 2, & 3. (164) _De Temperament._ l. 1. c. 4. & _Commentar. in Epidem._ l. 3. (165) L. 6. v. 1098. (166) Histor. Afric. _l._ 1. _c._ 1. Vid. Purchas’s _Pilgrims_, _l._ 6. _c._ 1. (167) _Prognostic._ 1. & _Galen. Comment_. (168) Sect. 3. Aph. 11. (169) _De Febre Malign_ l. 1. c. 11. (170) _De Aere, Locis, & Aquis._ (171) Φύσιες Νούσων ἰητροἰ. _Hippocr._ Epid. 6. (172) _Dissertatio de opera quam præstant corpora acida vel alcalica in Curatione Morborum._